For most products, when the process enters the grinding stage, it proves that more than 90% of the processing procedures of the product parts have been completed in the early stage. Grinding is the final processing procedure of the product parts. In the current grinding field, advanced means are used to complete the final processing of high-end products.
For most products, when the process enters the grinding stage, it proves that more than 90% of the processing procedures of the product parts have been completed in the early stage. Grinding is the final processing procedure of the product parts. In the current grinding field, advanced means are used to complete the final processing of high-end products.
Advanced grinding technology is a comprehensive technology, involving the equipment status of grinding, the scientific nature of the grinding process, the rationality of the grinding tool and abrasive, and the integration of multiple technologies such as online detection of the workpiece during the entire processing process. The technical difficulty is relatively high.
1. The demand for high-end grinding technology
In the grinding process, each industry will combine the different technical requirements of the industry, formulate a processing technology that meets the product, and select equipment that can process the product to achieve the accuracy of the product drawing in a targeted manner. However, the equipment used in my country's automobile manufacturing, aerospace, equipment manufacturing, shipbuilding, rail transit manufacturing and functional component manufacturing, due to the strict final processing technology requirements, high dimensional accuracy and form and position tolerance requirements, the equipment used in high-integration grinding processing is monopolized by foreign machine tools, resulting in a large number of imported grinding equipment, especially high-speed, high-precision, intelligent and flexible grinding machines, which are almost entirely imported. Most of the domestic grinding equipment can only do some semi-finishing processes. my country is the world's largest producer and consumer of machine tools. The large-scale import of grinding machine tools shows that domestic grinding equipment cannot meet the requirements of high-end product grinding technology.
In the field of automobile manufacturing, representative engine key parts such as crankshafts, camshafts, connecting rods, etc. require high-precision CNC grinders, and transmission key parts require gear finishing grinders, etc. In addition, in the field of automobile manufacturing, the parts are relatively small but require high machine tool precision and short production cycle. The machine tools that can be put into production require stable and reliable quality and low failure rate.
The precision forming of first-class domestic and foreign automobile manufacturers has further demand for grinding technology. The manufacturing of engine camshafts and connecting rods has completed the strategic shift from cutting to forming, and has developed towards green and lightweight manufacturing technology. At present, the crankshaft grinder produced by the British LANDIS company uses the "peeling method" to clamp from blank to fine grinding in one time, which takes only a few minutes and the grinding speed is as high as 120 m/s.
In the field of aerospace manufacturing, manufacturing technology will develop in the direction of high performance, precision, and digitalization. With the development and progress of manufacturing technology, the aerospace industry needs CNC internal and external cylindrical composite grinders and CNC precision grinding and multi-axis linkage grinding equipment for high-speed, precision, and complex-shaped components such as aircraft landing gear, and will also involve heavy and ultra-heavy equipment. In the field of rail transportation, a large number of medium-sized special CNC axle cylindrical grinders for rail transportation and CNC crankshaft grinders required for processing diesel engine crankshafts are needed.
The shipbuilding industry needs larger CNC crankshaft grinders
In high-end crankshaft grinders, the specific reflection in automobile manufacturing companies is precision and production rhythm, in the field of rail transportation, precision is the first priority, and in the field of shipbuilding, the load of the machine tool must be considered first.
2. Foreign grinder manufacturers
Currently, the representative manufacturers of various types of grinders abroad are shown in the attached table.
Grinding machine models and manufacturers
Grinding machine models Manufacturers
High-precision internal and external cylindrical grinders Studer, Kellenberger, Schleifring
High-precision surface grinders Blohm, Aba, ELB, Favretto
Guide grinders Waldrich Coburg, Favretto, Sumitomo Seiki
Crankshaft and cam grinders Junker, Landis, Studer, Toyota Machinery
Large crankshaft grinders Naxos Union, Cetos, Wohlenberg, Karatsu
Large roll grinders Ingesoll
Centerless grinders Koyo, Mikrosa
Honning machines Green, Sunnen, Nagel
Ball screw grinders Coburg, Mitsui Seiki
Gear grinders Gleason
Five-axis tool grinders Walter, Anka, Sack
Among the above equipment, there are machines that can process key parts of machine tools and functional parts accessories at a high level. Such as: machine tools for processing machine tool spindles, machine tool guides, precision indexing plates, precision bearings, gear racks, rolling guide accessories and other spare parts.